JPS5398840A - Detection of deterioration state of developing agnet - Google Patents

Detection of deterioration state of developing agnet

Info

Publication number
JPS5398840A
JPS5398840A JP1388477A JP1388477A JPS5398840A JP S5398840 A JPS5398840 A JP S5398840A JP 1388477 A JP1388477 A JP 1388477A JP 1388477 A JP1388477 A JP 1388477A JP S5398840 A JPS5398840 A JP S5398840A
Authority
JP
Japan
Prior art keywords
deterioration state
detection
developing
agnet
developing agnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1388477A
Other languages
Japanese (ja)
Inventor
Koji Sakamoto
Seiichi Miyagawa
Susumu Tatsumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1388477A priority Critical patent/JPS5398840A/en
Priority to US05/875,345 priority patent/US4195260A/en
Priority to DE2805510A priority patent/DE2805510C3/en
Publication of JPS5398840A publication Critical patent/JPS5398840A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0853—Detection or control means for the developer concentration the concentration being measured by magnetic means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00—Dispensing
    • Y10S222/01—Xerography

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To detect the occurrence of a spent toner or deterioration state of a developing agent in a simple and precise manner by comparing the measurement value of the density of the developing agent from which the toner has been separated from a carrier with the reference value of measurement.
JP1388477A 1977-02-09 1977-02-09 Detection of deterioration state of developing agnet Pending JPS5398840A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1388477A JPS5398840A (en) 1977-02-09 1977-02-09 Detection of deterioration state of developing agnet
US05/875,345 US4195260A (en) 1977-02-09 1978-02-06 Apparatus for sensing deterioration of developing substance including ferromagnetic carrier and non-magnetic toner particles
DE2805510A DE2805510C3 (en) 1977-02-09 1978-02-09 Method for determining the state of use of an electrophotographic developer and a device for carrying out such a method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1388477A JPS5398840A (en) 1977-02-09 1977-02-09 Detection of deterioration state of developing agnet

Publications (1)

Publication Number Publication Date
JPS5398840A true JPS5398840A (en) 1978-08-29

Family

ID=11845619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1388477A Pending JPS5398840A (en) 1977-02-09 1977-02-09 Detection of deterioration state of developing agnet

Country Status (3)

Country Link
US (1) US4195260A (en)
JP (1) JPS5398840A (en)
DE (1) DE2805510C3 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA794794B (en) * 1978-09-28 1980-08-27 Lucas Industries Ltd Displacement transducers
JPS55121459A (en) * 1979-03-14 1980-09-18 Hitachi Ltd Developer supervising device
JPS5726879A (en) * 1980-07-23 1982-02-13 Mita Ind Co Ltd Control device for replenishing of developer
US4468112A (en) * 1981-02-18 1984-08-28 Canon Kabushiki Kaisha Developer concentration controlling device
US4357901A (en) * 1981-09-03 1982-11-09 Bunnington Corporation Method and system for magnetically sensing and controlling toner concentration and optical density of copies in electrostatic reproduction
US4397184A (en) * 1981-10-09 1983-08-09 International Business Machines Corporation Method and apparatus for testing xerographic developer mix
EP0086516B1 (en) * 1982-02-11 1986-05-28 Agfa-Gevaert N.V. Xerographic copying apparatus
US4447145A (en) * 1982-04-30 1984-05-08 Xerox Corporation Charged particle sensor
US4523146A (en) * 1982-06-21 1985-06-11 Champaigne Jack M Mass flow indicator for metal particles
JPS5910814A (en) * 1982-07-12 1984-01-20 Hitachi Metals Ltd Level sensor for toner
US4515292A (en) * 1983-05-19 1985-05-07 Burroughs Corporation Digital implementation of toner concentration sensing apparatus
US4567437A (en) * 1983-06-10 1986-01-28 Hubbard Lincoln W Dual oscillator method for detecting flaws in a moving chain
US4804996A (en) * 1984-06-21 1989-02-14 Xerox Corporation Charged particle sensor having magnetic field control
EP0193168A3 (en) * 1985-02-25 1989-01-25 Kubota Limited Method of inspecting carburization and probe therefor
US4859940A (en) * 1987-09-09 1989-08-22 Westinghouse Electric Corp. Apparatus for detecting onset of slag entrainment in a molten metal stream
US4836417A (en) * 1988-08-29 1989-06-06 Agency Of Industrial Science And Technology Apparatus for continuous supply of fine powder, viscous fluid or the like at a constant rate
US5081498A (en) * 1991-01-10 1992-01-14 Xerox Corporation Humidity compensation in electrophotographic printing by measuring the dielectric characteristics of the development mixture
US5502378A (en) * 1993-07-26 1996-03-26 Caterpillar Fluid particle sensor including a container, a first coil and a second coil disposed about a magnet located adjacent the container for attracting the particles
JPH09179458A (en) * 1995-12-25 1997-07-11 Minolta Co Ltd Image forming device
DE19643653B4 (en) * 1996-10-22 2004-10-07 OCé PRINTING SYSTEMS GMBH Device for exchanging carriers of a two-component developer in electrophotographic printing and copying devices
JP4304856B2 (en) * 2000-10-31 2009-07-29 株式会社島津製作所 Nuclear magnetic resonance apparatus
DE10322913A1 (en) * 2003-05-21 2004-12-16 Bayer Technology Services Gmbh Method and device for measuring the content of ferromagnetic particles in liquid suspensions or solid mixtures
JP6332231B2 (en) * 2015-10-28 2018-05-30 京セラドキュメントソリューションズ株式会社 Developing device and image forming apparatus
JP7275550B2 (en) * 2018-12-05 2023-05-18 コニカミノルタ株式会社 Image forming apparatus, deterioration state detection method, and deterioration state detection program

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999687A (en) * 1974-07-17 1976-12-28 Savin Business Machines Corporation Toner concentration detector

Also Published As

Publication number Publication date
US4195260A (en) 1980-03-25
DE2805510B2 (en) 1979-12-13
DE2805510A1 (en) 1978-08-10
DE2805510C3 (en) 1980-08-28

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